WO2018107932A1 - 煤岩动力灾害声电瓦斯实时自动监测系统及方法 - Google Patents
煤岩动力灾害声电瓦斯实时自动监测系统及方法 Download PDFInfo
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- WO2018107932A1 WO2018107932A1 PCT/CN2017/110680 CN2017110680W WO2018107932A1 WO 2018107932 A1 WO2018107932 A1 WO 2018107932A1 CN 2017110680 W CN2017110680 W CN 2017110680W WO 2018107932 A1 WO2018107932 A1 WO 2018107932A1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- the invention relates to the field of mine safety and monitoring and monitoring, in particular to a real-time automatic monitoring system and method for sound and electricity gas of coal rock power disaster.
- Coal mine rock and rock power disasters mainly include coal (rock) and gas (methane or carbon dioxide) protrusion, coal and gas pressure, impact ground pressure and so on.
- coal mine rock disasters such as mine gas outburst and impact ground pressure are becoming more and more serious and complex, and the disaster risk is obviously increased.
- some mines with no power disaster or obvious signs are now also Gradually emerged, seriously threatening the life safety of underground workers and the normal production of mines.
- the static method is mainly realized by drilling and observing some physical indexes in the borehole, including the cuttings magnification method, the initial gas velocity method for drilling gas, the gas desorption index method for cuttings and other comprehensive index methods.
- the continuity of these static methods is poor, the measurement needs to occupy a certain working time and space, the engineering quantity is large, the working time is also long, and it has certain influence on the production; the safety during operation is poor, and it is easy to induce during drilling. Dynamic disaster; the accuracy of prediction is low, and it is susceptible to the uneven distribution of labor and coal.
- the dynamic method prediction mainly analyzes and predicts the signals such as electromagnetic radiation, acoustic emission, microseismic, gas emission or gas concentration continuously.
- the advantages are obvious, and the signal continuity is good, and the monitoring process has little impact on production.
- they also have their own limitations.
- Microseismic, geophone, electromagnetic radiation and gas monitoring are independent. They have different adaptability and sensitivity to different environments and influencing factors. They are interfered by mining and drilling processes, electromechanical equipment and monitoring sensor movement. Different and more serious, and can not be accurately identified.
- the research shows that sound waves, electromagnetic radiation and gas have a good response to coal-rock dynamic disasters, but they are not completely synchronized.
- the multiple signals are complementary.
- the combination of the three can more fully reflect the stress, deformation and fracture process of coal and rock mass.
- the occurrence and failure of gas and the evolution process of coal-rock dynamic disasters can be combined with the trend method to warn the danger of coal-rock dynamic disasters. Due to the failure of simultaneous high-speed monitoring of multiple signals, interference signals such as electromechanical equipment, mobile sensors and mining activities cannot be automatically monitored and cannot be automatically and effectively identified.
- the anomalous area in front of the working face has a great impact on safe and efficient production. It is the main area where coal-rock gas dynamic disaster occurs.
- the anomalies such as the structure in front of the working face and the change of coal and rock gas mainly through borehole detection or geophysical exploration. Method to solve the problem of low detection and recognition accuracy for small and abnormally small areas, The dynamic influence is large and the real-time performance is poor. How to use the monitoring means to effectively monitor and identify the structure, high stress, coal thickness change, coal rock mass strength change and gas occurrence abnormality are also urgent problems to be solved.
- the present invention is directed to a demand and a problem existing in the prior art, and provides a real-time automatic monitoring system and method for coal and rock dynamic disaster sound and electricity gas, which can load and deform cracked coal rock in mining face Process, gas emission process, anomaly in front of working face, evolution process of coal and rock dynamic disasters, effectiveness of measures, etc.
- Effective, non-contact, continuous uninterrupted and remote monitoring, evaluation and early warning, equipment installation and operation are convenient, automation and intelligence High degree of conversion, no impact on production, low cost.
- the present invention includes an automatic monitoring system and an automatic monitoring method
- Acoustic and electric gas real-time automatic monitoring system for coal and rock dynamic disasters including acoustic wave probe, electromagnetic antenna, gas sensor, communication substation, substation power supply, optical fiber network, monitoring center machine, monitoring terminal, current sensor, voltage sensor and acoustic electricity gas Synchronous monitor; acoustic probe, electromagnetic antenna, current sensor, voltage sensor and gas sensor are connected with corresponding sensor input interfaces of the acoustic electric gas synchronous monitor; the communication interface of the acoustic electric gas synchronous monitor is connected with the input end of the communication substation, The communication substation is connected through the optical fiber network, the switch and the monitoring center machine and the monitoring terminal; the substation power is connected with the voltage stabilizing circuit of the acoustic electricity gas synchronous monitor; the acoustic wave probe, the electromagnetic antenna, the gas sensor, the current sensor and the voltage sensor and sound
- the electric gas synchronous monitor is connected to form a monitor, and the plurality of monitors are arranged in the underground mining face or the roadway monitoring area.
- the acoustic electric gas synchronous monitor comprises an acoustic wave probe interface, an electromagnetic antenna interface, a gas sensor interface, a current sensor interface, a voltage sensor interface, a signal conditioner, a signal conversion circuit, a microprocessor, a data memory, a display and a communication interface
- the voltage stabilizing circuit is connected with the input end of the acoustic signal conditioner, the electromagnetic antenna interface is connected with the input end of the electromagnetic signal conditioner, and the gas sensor interface, the current sensor interface and the voltage sensor interface are respectively connected with the corresponding signal conversion circuit;
- the signal conditioner And the output end of the signal conversion circuit is connected to the input end of the microprocessor;
- the communication interface input end, the display, the keyboard and the data memory are all connected with the I/O interface of the microprocessor; the output end of the microprocessor is connected with the communication interface;
- the circuit provides the required DC power for the acoustic-electric gas synchronous monitor and sensor.
- the integrated automatic monitoring of acoustic and electric gas signals is realized, which ensures the synchronization of effective signal monitoring; the power supply condition of the cable is monitored by the access voltage sensor, and the current sensor is connected to monitor the working condition of the electromechanical equipment, thereby realizing the electrification of the electromechanical equipment in the monitoring area. And the working conditions, realizing automatic real-time monitoring of various interferences such as electromagnetic and acoustic waves; through the abrupt characteristics of acoustic waves and electromagnetic signals, spectral characteristics, combined with voltage and current monitoring results, automatic identification of interference signals, probes and antenna movements is achieved; Monitoring, filtering and data analysis can obtain effective sonic signals and effective electromagnetic signals.
- Figure 1 is a monitoring flow chart of the present invention.
- FIG. 2 is a layout view of a field monitoring instrument of the present invention.
- Figure 3 is a block diagram showing the construction of the system of the present invention.
- Acoustic and electric gas real-time automatic monitoring system for coal and rock dynamic disasters including acoustic wave probe, electromagnetic antenna, gas sensor, current sensor, voltage sensor, acoustic and electric gas synchronous monitor, communication substation, substation power supply, optical fiber network, monitoring center machine, Monitoring terminal; acoustic wave probe 1, electromagnetic antenna 2, current sensor 4, voltage sensor 5 and gas sensor 3 are connected with corresponding sensor input interfaces of acoustic electric gas synchronous monitor 6; communication interface and communication of acoustic electric gas synchronous monitor 6 The input end of the substation 7 is connected, and the communication substation 7 is connected to the monitoring center machine 10 and the monitoring terminal unit 11 through the optical fiber network 9 and the switch 13; the substation power supply 8 is connected to the voltage stabilizing circuit of the acoustic electric gas synchronous monitor 6; The acoustic wave probe 1, the electromagnetic antenna 2, the gas sensor 3, the current sensor 4 and the voltage sensor 5 are connected with the acoustic-electric gas synchronous monitor 6 to form a monitor, and the plurality of monitors
- the acoustic electric gas synchronous monitor comprises an acoustic wave probe interface, an electromagnetic antenna interface, a gas sensor interface, a current sensor interface, a voltage sensor interface, a signal conditioner, a signal conversion circuit, a microprocessor, a data memory, and a display
- the circuit connection; the output of the signal conditioner and the signal conversion circuit is connected to the input of the microprocessor; the input end of the communication interface, the display, the keyboard and the data memory are all connected with the I/O interface of the microprocessor; the output of the microprocessor is The communication interface is connected; the voltage stabilizing circuit provides the required DC power for the acoustic-electric gas synchronous monitor and the sensor.
- the electromagnetic antenna can be a broadband antenna or an ultra low frequency antenna.
- the ultra-low frequency antenna has a passband of 30 to 1000 Hz, high sensitivity and directional characteristics.
- the upper limit frequency of the broadband antenna is not less than 500 kHz, the bandwidth is not less than 500 kHz, the sensitivity is high, and the orientation is characterized.
- the sonic probe can be an acoustic emission probe, a geophone probe or a microseismic probe.
- the amplification factor can be adjusted, and the output is directly sent to the analog-to-digital converter of the microprocessor for conversion.
- It is composed of a microprocessor, a signal conditioner, a signal converter, a display, a data memory, a signal output circuit, a power supply, a button, etc., thereby realizing synchronous acquisition, display, and storage of sound waves, electromagnetic waves, gas, current, voltage signals, and waveforms. And output.
- sampling rate adjustable from 1 kHz to 1 MHz to meet different needs
- SD/TF card is used as the storage device, and the data storage capacity is greater than 8 GB;
- the monitor is powered by an external power supply, and can also directly use the power supply provided by the communication substation, and the working voltage is 15 to 32 VDC.
- a fixed +5V power supply is provided through the wide voltage input power supply module K7805 for use in the digital circuit section.
- a fixed +12V power supply is provided through the wide voltage input power supply module K7812 for use in the signal conditioner section.
- RS485 signal interface 4 ⁇ 20mA signal interface, 200 ⁇ 1000Hz signal interface, CAN bus interface, Ethernet interface, which can adapt to different monitoring system requirements, all can be carried out by cable and communication substation. Connect, real-time transmission of test data to the monitoring center.
- the communication substation is a downhole substation in the mine monitoring and monitoring system, which can receive monitoring data and waveform data from the acoustic electricity gas synchronous monitor and upload it to the monitoring center machine.
- the monitoring center machine is composed of a data storage server, a data real-time analysis server, a data backup server, and a system management server.
- the automatic monitoring method of the present invention is:
- the acoustic and electric gas synchronous monitor is connected to the acoustic wave probe, the electromagnetic antenna and the gas sensor, and synchronously receives the real-time signals and waveforms of the acoustic wave, electromagnetic radiation and gas concentration, and can synchronously reflect the loading, deformation and rupture of the coal rock mass in front of the working face, and the gas seepage out.
- the interference of electromechanical equipment, sensor displacement and the influence of mining surface mining disturbance are recognized: when the monitored sound waves and electromagnetic signals are abrupt, and the sound and electricity are The signal has the spectral characteristics of the interference of the electromechanical equipment.
- the voltage and current signals are also abrupt, it indicates that the acoustic wave and electromagnetic signal are caused by the interference of the electromechanical equipment.
- the monitored acoustic and electromagnetic signals are abrupt, the acoustic and electrical signals have artificially shifted the characteristic spectrum of the sensor.
- the acoustic wave and electromagnetic signal are caused by the movement of the acoustic probe and the electromagnetic antenna; when the acoustic, electromagnetic and gas signals have the characteristics of sudden increase and stable attenuation, it indicates that the working face is performing mining activities; monitoring The obtained acoustic wave signal and electromagnetic signal filter out the interference signal to obtain an effective acoustic wave signal and an effective electromagnetic signal.
- an acoustic wave probe, an electromagnetic antenna, and a gas sensor on the measuring point or working surface to be monitored. Align the effective receiving direction of the electromagnetic antenna with the monitored area of the coal rock body, and fix the antenna. The distance between the antenna and the measured area is not more than 30.
- the meter is suitable for the sound wave probe according to the measured frequency band, and the acoustic wave signal in the coal rock is monitored.
- the gas sensor is installed according to the requirements of the “Safety Regulations for Coal Mines”; the power cable of the electromechanical equipment is installed in the monitoring area.
- the acoustic and electric gas synchronous monitor synchronously monitors the acoustic wave, electromagnetic, gas concentration, current and voltage signals in the measuring point area or working surface, and uploads the number to the monitoring center machine; the monitoring center machine analyzes the changes of each signal and identifies the interference of the electromechanical equipment.
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Emergency Alarm Devices (AREA)
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
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Abstract
Description
Claims (3)
- 一种煤岩动力灾害声电瓦斯实时自动监测系统,其特征在于:包括声波探头、电磁天线、瓦斯传感器、通信分站、分站电源、光纤网、监测中心机、监测终端机、声电瓦斯同步监测仪、电流传感器和电压传感器;声波探头、电磁天线、电流传感器、电压传感器和瓦斯传感器与声电瓦斯同步监测仪的相应传感器输入接口连接;声电瓦斯同步监测仪的通信接口与通信分站的输入端连接,通信分站通过交换机、光纤网与监测中心机和监测终端机连接;分站电源与声电瓦斯同步监测仪的的稳压电路连接;声波探头、电磁天线、瓦斯传感器、电流传感器及电压传感器与声电瓦斯同步监测仪连接构成监测器,多个监测器布置在井下采掘工作面或巷道监测区域内。
- 根据权利要求1所述的煤岩动力灾害声电瓦斯实时自动监测系统,其特征在于:所述的声电瓦斯同步监测仪包括声波探头接口、电磁天线接口、瓦斯传感器接口、电流传感器接口、电压传感器接口、信号调理器、信号转换电路、微处理器、数据存储器、显示器和通信接口、稳压电路;声波探头接口与声波信号调理器输入端连接,电磁天线接口与电磁信号调理器输入端连接,瓦斯传感器接口、电流传感器接口、电压传感器接口分别与相应信号转换电路连接;信号调理器和信号转换电路的输出端与微处理器输入端连接;通信接口输入端、显示器、键盘和数据存储器均与微处理器的I/O接口连接;微处理器输出端与通信接口连接;稳压电路为声电瓦斯同步监测仪和传感器提供所需直流电源。
- 一种利用权利要求1所述煤岩动力灾害声电瓦斯实时自动监测系统的自动监测方法,其特征在于:在需要监测的测点或工作面安装声波探头、电磁天线、瓦斯传感器,在动力电缆上安装电流传感器和电压传感器,分别接入声电瓦斯同步监测仪的相应传感器输入接口,连接通信分站、分站电源、交换机和监测中心机;声电瓦斯同步监测仪同步接收声波、电磁、瓦斯浓度、电压和电流信号,并将数据实时上传到监测中心机;通过声波、电磁辐射和瓦斯浓度实时信号及波形,能够同步反映工作面前方煤岩体受载、变形破裂、瓦斯渗流涌出情况、信号波形特征、频谱特征及其变化,通过电压信号监测动力电缆通电情况,电流信号监测机电设备工作情况;监测中心机分析各信号变化情况,识别机电设备干扰、采掘活动及探头、天线移设情况和有效信号:当监测的声波、电磁信号发生突变,且声电信号具有机电设备干扰的频谱特征,电压和电流信号也发生突变时,表明声波、电磁信号为机电设备干扰所致;当监测的声波、电磁信号发生突变,声电信号具有人为移设传感器特征频谱,电压和电流信号未发生突变时,表明声波、电磁信号为声波探头和电磁天线移动所致;当声波、电磁和瓦斯信号具有突变增长及稳定衰减变化特征时,表明工作面进行采掘活动;监测得到的声波信号和电磁信号滤除干扰后得到有效声波信号和有效电磁信号;通过有效声波信号和有效电磁信号变化及频谱特征,结合瓦斯信号变化特征预警工作面前方异常区域及煤与瓦斯突出等煤岩动力灾害危险性:当有效声波、电磁信号和瓦斯信号中两个及以上呈现连续或波动式增长趋势,且信号强度和趋势变化超过区域异常相应临界值时,表明工作面前方为地质异常区域;当有效声波、电磁信号和瓦斯信号中两个及以上呈现连续、波动式增长趋势,且信号强度或趋势变化超过动力灾害危险相应临界值时,表明有动力灾害危险性。
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| CN106761931A (zh) | 2017-05-31 |
| AU2017375855B2 (en) | 2020-10-22 |
| AU2017375855A1 (en) | 2019-07-25 |
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